Threaded nut extension



FIG. 1 is a perspective view of my design;

FIG. 2 is another perspective view of my design from a different angle;

FIG. 3 is a side view of my design, the opposite side view being a mirror image thereof;

FIG. 4 is a front view of my design;

FIG. 5 is a rear view of my design; and,

FIG. 6 is a cross-sectional view of FIG. 3 along a longitudinal axis of my design. 

The ornamental design for a threaded nut extension, as shown and described. 